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I have an IOT2020 which I cannot connect via serial port. The USB led is turned on but USB host is also not recognized as a device. I have followed all the steps in the instructions about how to connect with UART. Is it a hardware problem how can I check whether it is a hardware problem or software?

I did not change the firmware on that device and without sdcard I should see at least the boot screen via serial connection. If I plug the sdcard image, it seems it is booting but the device is not pingable.

The other device (firmware updated) is also not reachable via UART. Since the MAC address is wiped out I am not sure if I can ping that device with the release image. I also need an answer for; How to set the MAC address after firmware update?

Both of IOT2020s (updated firmware and original firmware) are not reachable via UART.

And yes I'm using the release image for the device with original firmware. Which image should I use with Prototypes? At least I would know only UART is not working.

I also want to ask; What would you do if you encounter this kind of problem on your devices?

I don't know how to set the MAC address after updating your firmware. Updating firmware from prototype firmware to release firmware has never been tested, because this is not a use case.

I never had the case that UART did not work anymore. I would check if the cable is plugged correctly and if the driver is installed on the engineering system. And maybe it is possible that the device is broken. In this case we have to check the issue. We contact you!